Replacement of Fuel Sys

[gforbess at attglobal.net (Gordon Forbess)]

On Thu, 29 Apr 2004 11:33:16 +0000, "C Boyko" <roccit_53@hotmail.com>
wrote:

>I have something similar on the 16V. There is a tiny amount of leakage at 
>the bottom of the filler neck, which I priced, and would like to not have to 
>buy new ($280 CDN)... Anyways, what are you looking for on that vent?  Just 
>the usual rust, cracked plastic type thing? The smell of gas inside the car 
>is worse when the tank is full.
>And how big of a pain is the filler neck replacement gonna be (aside from 
>the whole "empty the fuel tank" issue) I think that's where I'm likley 
>headed.
>And another thing, there used to be a hissing/ pressure release when I took 
>the gas cap off, not anymore. I'm thinking this is related...
>Any input is appreciated. I have to get this fixed, obviously.
>Cathy

I just went through my fuel system.  I had discovered some rust in the
fuel filter (carb car w/ type 1 inline filter) and thought it was the
tank.  Dropped the rear axle and pulled the tank, only to see it was
fine.  The source of the rust was the filler pipe, which you *should*
be able to remove without pulling the tank.  One bolt in the fender
well, two screws near the gas cap and loosen the big hose clamp on the
hose between the filler and the tank (after you drain it of course). I
contemplated a replacement, but figured that would be a long shot
getting the part and/or cost mega bucks (which you confirm).

Took it to the local "gas tank renu" shop and they blasted and sealed
the inside of my filler pipe for 30 bucks.  This is also supposed to
take care of pin-hole leaks in tanks, etc. so it might work for you if
the hole is not too big.  The Por-15 treatment (starter kit about 18
bucks) is also supposed to cure pin-hole leaks if you want to DIY.

If the leak is big or the filler is about to self destruct from rust,
you might find one in the boneyard and treat it.  I read a number of
references to filler pipe rust problems with watercooled cars, so I
wouldn't re-install anything but new or reconditioned.  Rust in the
fuel is nothing but trouble.

See:  http://www.gastankrenu.com/welcome.htm  Looks like they also
have franchise locations in the Great White North.
Gordon

75 Mk I/Drake 1.9
http://pws.prserv.net/gforbess/scirocco/scirocco.htm